Task<T>.WithTimeout() TimeSpan overload should use TotalMilliseconds instead of Milliseconds

[AdamDotNet]

https://github.com/jamesmontemagno/mvvm-helpers/blob/master/MvvmHelpers/Utils.cs

TimeSpan.TotalMilliseconds converts the entire TimeSpan to milliseconds, whereas TimeSpan.Milliseconds simply returns the milliseconds portion of the timespan. If I wanted to timeout in 10 seconds, and used

Task task; //...
await task.WithTimeout(TimeSpan.FromSeconds(10));

I would get a timeout of 0 milliseconds instead of 10000 milliseconds.

[jamesmontemagno]

Fixed. Thanks